Transcript Renewable Power Generation

Renewable Power Generation
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Solar Photovoltaic (PV)
Wind Energy
Hydropower
Solar Thermal Electric
Geothermal
Renewable Power Generation (cont.)
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Photovoltaic Power:
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Principal of operation
photoelectric effect
silicon cell “doping” produces p-type (positive) and
n-type (negative) “electrons and holes” resulting in
“p-n junction”.
RESULTS IN ELECTRICITY FLOW !!!
Renewable Power Generation (cont.)
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Photovoltaic Power:
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Conversion of energy
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30% maximum efficiency possible
Typical is 10-15% effic. for standard “single-crystal” cells
(lower for “thin-film” cells)
“Thin-ribbons” used to reduce manufacturing $$
Amorphous silicon (not single crystal) used for
calculators and watches– better efficiency in fluorescent
light
Renewable Power Generation (cont.)
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PV System Configurations:
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Series-
voltages are additive; current is same
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Parallel-
current is additive; voltages are same
Typical solar array is combination of
series and parallel.
Output is DC voltage
Renewable Power Generation (cont.)
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PV System Configurations:
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Batteries used for electrical energy storage
Inverters needed for AC power
Regulators needed to ensure no over-charging of
batteries
Co-generation capabilities for excess power
(i.e. California is req’d to purchase surplus power !!)